A Comprehensive Evaluation Method for Cascading Fault Search Based on Probability Index and Severity Index

A technology of cascading failures and comprehensive evaluation, applied in the direction of instruments, data processing applications, calculations, etc., can solve problems such as power system cascading failures, system crashes, and failure to comprehensively consider the severity of subsequent developments

Active Publication Date: 2017-08-25
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

The reason is that after the initial disturbance of the power system, due to factors such as power flow changes, equipment overload, and relay protection actions, cascading failures are caused, resulting in system collapse.
Because there are many possibilities of branches and bifurcations in the development sequence of cascading faults, the existing search algorithms can only obtain individual possible cascading fault chains according to the principle of high probability, and cannot be considered comprehensively in the search process Influence of Probability of Occurrence and Severity of Subsequent Development

Method used

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  • A Comprehensive Evaluation Method for Cascading Fault Search Based on Probability Index and Severity Index
  • A Comprehensive Evaluation Method for Cascading Fault Search Based on Probability Index and Severity Index
  • A Comprehensive Evaluation Method for Cascading Fault Search Based on Probability Index and Severity Index

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[0054] The present invention provides a comprehensive evaluation method for cascading failure search based on probability indicators and severity indicators. In order to make the objectives, technical solutions and effects of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0055] See figure 1 , figure 1 It is a flowchart of a preferred embodiment of the comprehensive evaluation method for cascading failure search based on probability index and severity index of the present invention. Such as figure 1 As shown, the comprehensive evaluation method for cascading failure search based on probability index and severity index includes:

[0056] S100. Obtain the failure probability index of the candidate equipment in each cas...

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Abstract

The comprehensive evaluation method for cascading fault search based on the probability index and severity index provided by the present invention can respectively obtain the probability index and severity of the failure of the next-level alternative line by analyzing the operation state of the power grid after each level of fault Indicators, graded and integrated to obtain the comprehensive risk index of cascading failures of the alternative lines, which is convenient, simple and efficient, and can provide a basis for judging the weak links of the system and formulating prevention and control strategies to reduce the risk of cascading failures.

Description

Technical field [0001] The invention relates to the technical field of power system safety protection, in particular to a cascading failure search comprehensive evaluation method based on probability indicators and severity indicators. Background technique [0002] With the continuous expansion of the scale of the power system, there have been many major blackouts in the domestic and foreign power systems in recent years, such as the "8.10" blackout in the western power grid of the United States, the "8.14" blackout in the United States and Canada, the "9.28" blackout in Italy, and the "11.4" in Europe Blackout etc. The reason is that after the initial disturbance, the power system causes cascading failures due to factors such as power flow changes, equipment overload, and relay protection actions, leading to system collapse. Because the development sequence of cascading failures has a variety of branching and bifurcation possibilities, existing search algorithms generally can o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06
Inventor 李蓉蓉邸鹏宇周保荣管霖王素云马义松金小明
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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